user
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Distinguish between the given sentences and identify the one that is constructed incorrectly.

### Input:
a) I saw John and Patrick visting the museum yesterday.
b) I seen John and Patrick visting the museum yesterday.

### Response:
assistant
b) I seen John and Patrick visting the museum yesterday.